In article , Jaques d'Altrades
writes

When Yahoo Groups took over the lists to which I subscribed there was an
immediate deluge of spam, which gradually subsided after I unsubscribed.

I haven't had any trouble, being grandfathered in from EGroups, but I've
heard that when signing up to Yahoo Groups you have to be careful to
check the no advertising box. (Unless, of course, you want to receive
the advertising.)
--
Stewart Robert Hinsley